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Apple Developer Docs

MetricKit / OptimizedTimeToFirstDrawMetric / histogram

histogram

Histogram of optimized time to first draw durations.

Declaration

let histogram: Histogram<UnitDuration>

Open on developer.apple.com

MetricKitInstance Property

iOS 27.0+iPadOS 27.0+Mac Catalyst 27.0+macOS 27.0+

Built on 2026-06-12 · Snapshot snapshot-20260612-beta.1 (macOS 27.0) · Commit fba13e1 · by @g-cqd · based on Apple Developer Documentation